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Finding the Fourth Proportional to 28,041.76, 42,061.72 and 11,396.88

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Solution

The fourth proportional to 28,041.76, 42,061.72 and 11,396.88 is: 17,094.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,041.76 : 42,061.72 = 11,396.88 : x
  2. Step 2: Convert to fraction form
    28,041.76/42,061.72 = 11,396.88/x
  3. Step 3: Cross multiply
    28,041.76x = 42,061.72 × 11,396.88
  4. Step 4: Simplify right side
    28,041.76x = 479,372,375.43
  5. Step 5: Solve for x
    x = 479,372,375.43/28,041.76
  6. Step 6: Final answer
    x = 17,094.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.